grader.py

[Alka-dot]

grader.pyimport requests
import json
import numpy as np
from collections import OrderedDict

class Grader(object):
def init(self):
self.submission_page = 'https://www.coursera.org/api/onDemandProgrammingScriptSubmissions.v1'
self.assignment_key = 'MSsYBMLgEeesWhJPHRLG5g'
self.parts = OrderedDict([('f5nXa', 'TextPrepare'),
('hTrz8', 'WordsTagsCount'),
('0kUjR', 'BagOfWords'),
('tLJV1', 'MultilabelClassification')])
self.answers = {key: None for key in self.parts}

@staticmethod
def ravel_output(output):
    '''
       If student accidentally submitted np.array with one
       element instead of number, this function will submit
       this number instead
    '''
    if isinstance(output, np.ndarray) and output.size == 1:
        output = output.item(0)
    return output

def submit(self, email, token):
    submission = {
                "assignmentKey": self.assignment_key, 
                "submitterEmail": email, 
                "secret": token, 
                "parts": {}
              }
    for part, output in self.answers.items():
        if output is not None:
            submission["parts"][part] = {"output": output}
        else:
            submission["parts"][part] = dict()
    request = requests.post(self.submission_page, data=json.dumps(submission))
    response = request.json()
    if request.status_code == 201:
        print('Submitted to Coursera platform. See results on assignment page!')
    elif u'details' in response and u'learnerMessage' in response[u'details']:
        print(response[u'details'][u'learnerMessage'])
    else:
        print("Unknown response from Coursera: {}".format(request.status_code))
        print(response)

def status(self):
    print("You want to submit these parts:")
    for part_id, part_name in self.parts.items():
        answer = self.answers[part_id]
        if answer is None:
            answer = '-'*10
        print("Task {}:\n {}".format(part_name, answer[:100] + '...'))

def submit_part(self, part, output):
    self.answers[part] = output
    print("Current answer for task {} is:\n {}".format(self.parts[part], output[:100] + '...'))

def submit_tag(self, tag, output):
    part_id = [k for k, v in self.parts.items() if v == tag]
    if len(part_id) != 1:
        raise RuntimeError('cannot match tag with part_id: found {} matches'.format(len(part_id)))
    part_id = part_id[0]
    self.submit_part(part_id, str(self.ravel_output(output)))